I would argue that at the start, we need to test different technologies. We don't have an economically viable solution today for space heating that is low carbon.
I would argue that we need to be increasing the carbon taxes on the fuels we use for space heating. We should be encouraging heat pumps in regions where it makes sense. Obviously, they are very efficient and have a lot of opportunity. We can, hopefully, bring the cost down.
We also need to be looking at putting hydrogen into our natural gas, up to maybe 15% or 20%, and using that for moving towards decarbonization. We also need to be piloting some pure hydrogen heating in our building structures.
I think that in the transition pathway to a net-zero future, space heating is probably in the 2030s and 2040s. The real focus and opportunity today is in transport and some of the heavier industries. It's a timing issue.